Critics’ choice

Meghan Markle: The First 100 Days (Channel 5, 8pm-9pm)

The royal wedding may be a month away, but Channel 5 is starting the build up early with an evening dedicated to Meghan Markle. This documentary looks at the impact she has already made on Britain, the royals and the media as it charts her first 100 days as Prince Harry’s bride-tobe. It finds that her introduction to British life has not always been easy – certain sections of the media have been accused of racism and harassment in their coverage. But the programme looks to the future and asks if she could become our first truly feminist princess.

Britain’s Biggest Warship

(BBC2, 8pm-9pm)

New series. Film-maker Chris Terrill captures an intimate and personal portrait of life on board ultra-modern super aircraft carrier HMS Queen Elizabeth. In this first instalment, early 2016 sees sailors begin to arrive in Rosyth dockyard in Scotland where the ship is still in construction.

999: What’s Your Emergency?

(More4, 10pm-11.05pm)

The documentary follows paramedics as they deal with people who have mental health problems. Maria Stanley is called to a multi-storey car park, where she tries to talk a man away from the edge, while Kirsten Harper and Amy Siddall race to help a father who is having suicidal thoughts.